Photosynthesis General Knowledge MCQs

1. : What is photosynthesis?
(A) The process of respiration in animals
(B) The process by which plants make their food using sunlight
(C) The breakdown of food in the human body
(D) The movement of water in plants

2. : Which organelle in plant cells is responsible for photosynthesis?
(A) Mitochondria
(B) Ribosomes
(C) Chloroplast
(D) Nucleus

3. : What is the main pigment involved in photosynthesis?
(A) Hemoglobin
(B) Chlorophyll
(C) Melanin
(D) Carotene

4. : Which gas do plants take in for photosynthesis?
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Hydrogen

5. : What are the main products of photosynthesis?
(A) Carbon dioxide and water
(B) Glucose and oxygen
(C) Oxygen and nitrogen
(D) Hydrogen and carbon dioxide

6. : What is the primary source of energy for photosynthesis?
(A) Moonlight
(B) Soil nutrients
(C) Sunlight
(D) Water

7. : In which part of the plant does most photosynthesis occur?
(A) Roots
(B) Stems
(C) Leaves
(D) Flowers

8. : What is the process by which plants release oxygen during photosynthesis?
(A) Transpiration
(B) Respiration
(C) Exhalation
(D) Photolysis

9. : What is the role of water in photosynthesis?
(A) It absorbs carbon dioxide
(B) It provides oxygen and hydrogen
(C) It converts sunlight into energy
(D) It acts as a pigment

10. : What is the equation for photosynthesis?
(A) CO₂ + H₂O → C₆H₁₂O₆ + O₂
(B) O₂ + H₂O → CO₂ + C₆H₁₂O₆
(C) H₂O + O₂ → CO₂ + C₆H₁₂O₆
(D) CO₂ + O₂ → H₂O + C₆H₁₂O₆